如果我们开发的对象，不是在公网的环境内上网，是使用内网的，我们应该怎么样检测你的IE使用的代理服务器呢？接下来我们通过以下实例来学习：
//-----------------------------------------------
//记得引用 WinInet 单元
//-----------------------------------------------
uses
WinInet
//----------------------------------------------
//定义要使用的函数
//----------------------------------------------
function GetProxyInformation: string;
var
ProxyInfo: PInternetProxyInfo;
Len: LongWord;
begin
Result := '';
Len := 4096;
GetMem(ProxyInfo, Len);
try
if InternetQueryOption(nil, INTERNET_OPTION_PROXY, ProxyInfo, Len) then
if ProxyInfo^.dwAccessType = INTERNET_OPEN_TYPE_PROXY then
begin
Result := ProxyInfo^.lpszProxy
end;
finally
FreeMem(ProxyInfo);
end;
end;
procedure GetProxyServer(protocol: string; var ProxyServer: string;
var ProxyPort: Integer);
var
i: Integer;
proxyinfo, ps: string;
begin
ProxyServer := '';
ProxyPort := 0;
proxyinfo := GetProxyInformation;
if proxyinfo = '' then
Exit;
protocol := protocol + '=';
i := Pos(protocol, proxyinfo);
if i 0 then
begin
Delete(proxyinfo, 1, i + Length(protocol));
i := Pos(';', ProxyServer);
if i 0 then
proxyinfo := Copy(proxyinfo, 1, i - 1);
end;
i := Pos(':', proxyinfo);
if i 0 then
begin
ProxyPort := StrToIntDef(Copy(proxyinfo, i + 1, Length(proxyinfo) - i), 0);
ProxyServer := Copy(proxyinfo, 1, i - 1)
end
end;
//----------------------------------------------------------------
//使用范例
//----------------------------------------------------------------
procedure TForm1.Button1Click(Sender: TObject);
var
ProxyServer: string;
ProxyPort: Integer;
begin
GetProxyServer('http', ProxyServer, ProxyPort);
if ProxyPort=0 then
begin
ShowMessage('你的IE没有使用的代理服务器')
end
else
Label1.Caption := ProxyServer;
label2.Caption := IntToStr(ProxyPort);
end;
